Great video there Simon. I should pull our 019T off of the shelf give it a stripnrebuild and put her back into service now aye?
From what me and my dad have heard from many tree blokes in our classes, those Stihl locking strips are cheap and nasty and like to break off into the cyclinder. We have a piston stop we use and it screws securely and firmly into the thread just like the spark plug but with a proud nose to stop that piston.
The one point that I think is so crucial and almost always overlooked by the majority of the tree chainsaw blokes out there, is the chain brake and chain brake band. It wasn't taken into good detail in the video?
Sometimes some grit and crap can get in behind the band and it wont grip the drive sprocket straight away (a few milliseconds to late of a severe kickback). Aswell as changing out the brake band for a new one and checking the Chain brake spring which activates the band. The chain brake band is a consumable part people that could possible save your life one day(excuse my french) le french tight asses...
Just some points to help ya out mate with the "chainsaw parts terminology" as I understand them, to make you future videos even better.
What you called:
Brake cover/brake cover assembly:= Drive sprocket
Drive gear mechanism:= Worm gear
Bearing over the crank inside the clutch hub: Needle cage
Spark plug spanner/starhead allan key:= Stihl spline t wrench or scrench or stihl spline screwdriver
Can't think of any more at the moment, but will keep you posted (when my bloody net speed goes back up next month[grr the video took me over the limit])
But overall mate, keep up the good work. These videos will be very valuable to alot of people... Perhaps some daily services and weekly and monthly service general videos would be good aswell?